From the episode with the meteorite heading for Springfield:
3 mins 15 secs into clip
http://www.youtube.com/watch?v=3zwEcnXspDA
Moe: Hey, uh, I got an idea: we can play a game to pass the time.
Er, I’ll make the sound of a barnyard animal, and, er, you
all try to guess what it is. Ahem: [makes some
unidentifiable noise]
Wiggum: It’s a pig!
Bart: It’s a cow, man.
Lisa: It’s a pony.
Krusty: No, it’s a goat. You know, one of them lady goats.
Selma: There are no lady goats: a lady goat is a sheep.
Hibbert: I believe she’s right.
Otto: You’re crazy.
McAllister: Arr, what’s it to you?
Otto: What’s it to me?
[everyone starts arguing]
Marge: Stop it! Stop it! Can’t you see this barnyard noise
guessing game is tearing us apart?
[Ned still sings “Que Sera, Sera” outside]
Say, Moe, was it a duck?
[everyone argues again]
Homer: Shut up! Shut up! Stop it! Stop it. I can’t take this any
more. I can’t let that brave man out there die alone. I’m
surprised and disgusted by all of you – especially his
children. I’m going out there!
[goes out, slams door behind him]
[pops his head back in] It was a baby ox.
Moe: He’s right, you know.
Skinner: [surprised] About the ox?
Moe: About everything, dammit. Hey Homer, wait up. I want to die
too.
Apu: If you are going, I am going.
Barney: Me too!